Electrical-circuit breaker.



E. GASSMANN.

ELECTRICAL 011mm BREAKER.

APPLICATION FILED OCT. 81. 1913.

1,121,996. Patented D00. 22, 1914.

witnesses:

cAMA. G M W anvenfoz 1) KM filo elf Cornea;

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Specification of Letters Itctont.

Potenteci Application filed Got-obs: 31.. 1818. fierial tic. IF-35:227.

To all whom it may concern:

Be it known that l, EUGENE GAQSMAXS, a citizen of Germany, and a resident of'tne borough of Brooklyn, county of Kings, and State of New York, have invented certain new and useful improvements in Electrical-- Circuit Breakers, of which the following is :1 complete specification.

This invention relates to electricai ignition devices, and other appnratus,in which the flow of electrical current is periodically interrupted, and consists of the heroin shown and described mechanically operatable interrupter.

Circuit breakers, or interrupters, employed in apparatus of this kind are usually composed of two contacts, of which one as stationary and the other movable. The movablecdntacts are most frequently mounted on springs, set to press the contact against the stationary one, and some means, usually a cam, acts upon. the spring to sepia. rate the contact, mounted thereon, from the stationary thus breaking the circuit.

The closing of the contacts is then again effected by the rteaction oftlic eprin whercon the movable contactis income In the present state of the'art the contacts of a circuit breaker are usually mounted upon some rotating part, the actuating cam being stationary, or in a stntiozicry casing, the cam (or other actuating lievioe), lacing then rotated. Tho condition of efilcicnt operation of electrical circuit breakers is that the contacts should in brought together eve-1' the greatest posibie part of the area of their surfaces, and that their separation, interrupting the current, should be macic intantaneously and simultaneously, and as;

ncarly cqui-dictantly as possible, in tho cn tire extent of their contact surfaces. The construction of circuit breaker in which the movable contact is mountezi on a o ring poosesses the advantages of siznp lcity and. cheapness, and it is only because-oi the culty to produce springs that will retain theil original elasticity and accuracy of re actiorthat more cozngiicated; sii ostitutcs, in the shape of hell crnnkn, moving; wedges, etc, were introduced.

The object of my invention is the of a. plain spring contact circuit Breaker, which the advantages are secured, 112161 the stated defect obviated.

In the accompanying drawing Figure 1 is:

cover of the casing inclosing thociic'c 5 Pie. 2 is a vcrooosiectiom.l View 03- inc mic-aw: in Fig. 1; Fig. 3 is}; new, partly an elevation of a similarly structed circuit breaker, in which the 60:2, mats are mounted in the stntionarv casing. and the cam, operatic. the inorablsiconfi wt} is fixed to the end of t e :irmctylre' c326;

rototce with it; Fig. is c fiontelt intioai of the (ievicc; Fi 5 is an cnl'fi rgciiffictaii, showing the novi and distinguioliaing footure of my improved circuit breaker in the construction and essembl -"ing of the parts of the movable contact w i This movable contact no shown in Fig. 5 is made up of two cpringc, c and b, ioinnki 'm ggther on both code, the front apt-in c .ing straight and the other, 5, isezng bent at c, a point some distance front the and c; the part g: to a being 'arzailcl, or nec'riy so, to the spring a, and. t c other part of the spring 5 being iiofiected from one cent? 4* toward the 8 ring a. This deflection ic more than Wool be ncccssaryto make of: the lower ends of both springs mcct, and than, when the conic of the two opringa and :5 are cl'nrnpcti together-co, for in stonce--by the split bioclz .5, the spring 5 is thereby set to prose gainst the sprin a, '(Hldj-llfi springs are loads to act in unison, though each of them acts, or is uiilizc to not, in difiorent ways to the same end. Tin: upper ends of the syringe a. and 5 are space-ii by the block (I enc are held rigidiy ziniiefi: by the. screw-bolt or rivet 6, whose c snugly fitted to the point f of the stationery contact g. The other ends of the two sprin a and 3) are weaned and join 1 together, for-instance, by bcing clamperl in the split hiocl: by the screw This; clamping, or otherwise occuring to gather the other ends of? the cprings r: i) in a po' it, re if 2i =1 spring 15 he? rcction tow to spring a i attaining cie-nt operation oi whether the surfaces of the contact points, that is, of the head 6 of the screw-bolt e and of the end f of screw f are fiat, or one pointed and the other correspondingly concaved to increase the area of the contact surface, and eliminates the rendering of the circuit breaker ineffective by a deflection or weakening of the spring.

The points i of the cam i, abutting against the spring a, move the contact point e from the point 7'. This action takes place whether the disk is, whereon the contacts are mounted, rotates, and the cam 71 is fixed in the cover 11, of the casing, (see Figs. 1 and 2) or whether the cam is mounted on the armature shaft 1, and the contacts in the stationary casing m as shown in Figs. 3 and at. This action of thccam points i will not have the usual detrimental effect upon the spring a, inasmuch as the springs a and b are longitudinally immovable in relation to each other, and the spring a is, so to say, held taut by the spring 6, and thus cannot be bent, the strain of the cam upon it being correspondingly transferred upon the spring I), as the strain upon the string is taken up by a bow. The springs a and I) thus co-act and the result of this their coacting and co-resisting force is that the separating of the contact points is effected instantaneously and also simultaneously over the entire area of the contact surfaces;

the movable contact surface is not brought into an angular position, relatively to the contact surface of the stationary contact, the contact surfaces being held, by the coaction of the springs, at all times, in a position parallel to each other, ergo equi-distantly separated from each other in all points. When the cam points pass, the contact points are again brought together, the movable contact moving in the same [)ali;

strated that a circuit breaker thus constructed, is practically indestructible, and infallible in operation.

I claim as my invention:

I. A movable contact for electrical circuit breakers comprising a flexible arm made up of one straight, and one bent spring, the springs being joined to a spacing block on one end and their otherends clamped together and in a fixed position; a contact point affixed thereto on the free end; substantially as herein shown and described.

2. An electrical circuit breaker, comprising a stationary contact, a fixed clamp, a flexible arm made up 'of one straight and one bent spring, the ends of the two springs being held closely together and in fixed position in the clamp; a spacing block securedbehveen the free ends of the springs a movable contact mounted on the free end of the flexible arm, the flexible arm being set to press the contact, secured thereto, against the stationary contact,gand means acting upon the flexible arm to move the contact, mounted thereon, away from the stationary contact; substantially as herein shown and described.

. EUGENE GASSMANN.

Witnesses:

R. A.,P11 ER,

VERONICA BRAUN. 

